Manhole-cover



Patented June 28, 1898.

(No Model.)

T. P. GREGER. MANHOLE COVER. No. 606.206.

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PATENT THOMAS P. GREGER, OF PHILADELPHIA, PENNSYLVANIA.

MANHOLE-COVER.

SPECIFICATION forming part of Letters Patent No. 606,206, dated June 28,1898,

Application filed August 14, 1 8 9 7.

To all whom it may concern:

Be it known that I, THOMAS P. GREGER, a citizen of the United States,residing at the city of Philadelphia, in the county of Philadelphia andState of Pennsylvania, have in vented certain new and usefulImprovements in Manhole-Covers, of which the following is aspecification.

My invention has relation to that class of manhole-covers wherein themanhole is protected by two members, of which the top is substantiallydish-shaped and filled with as phaltum, granolithic, or similar matter;and in such connection it relates to the construction and arrangement ofsuch a filled 1nanhole-cover which is practically noiseless andnon-slipping, permits of Ventilation of the manhole, and is likewisereadily drainable.

The principal object of my invention is to provide a cover noiseless andnon-slipping, for a manhole, of simple construction and arrangement, andone which is adapted to permitof the ventilation of the manhole, as wellas the drainage of moisture or water from the same.

My invention, stated in general terms, consists of a manhole-coverconstructed and arranged in substantially the manner hereinafterdescribed and claimed.

The nature and scope of my invention will be more fully understood fromthe following description, taken in connection with the accompanyingdrawings, forming part thereof, in whicha Figure l is a top or plan Viewof a manholecover embodying main features of my invention and partiallybroken away to more clearly illustrate the construction and arrangementof the cover, and Fig. 2 is a vertical sectional Referring to thedrawings, a represents the frame orwall surmounting the manhole b andserving as a support for both members of the cover. The frame a isprovided with the concentrically-arranged webs a and a the inner web aof which forms a seat for the inner member 01 of the cover, while theouter web a is provided with a horizontally-arranged flange a, forming aseat for the upper dishshaped member 6 of the cover. The upper member 6is adapted to be'filled with asphal- Serial No. 648,227. No model.)

tum, granolithic, or similar matter, and its rim 6' is perforated, as at6 to form a, series of airholes or vents extending from the atmosof thecover. The inner member dis pro vided with a series of legs or props cl,screwed or otherwise secured tothe lower face of the member and adaptedto engage the upper edge or rim of the web a to support the member atabove said web. Between the concentric webs a and a is formed a chambera wherein moisture is adapted to collect, and this chamber is connectedby a pipe a with the sewer and is adapted to drain off through saidpipe. The upper member 6 is provided with handles or rings e tofacilitate its ready removal from the frame a, and the inner member d islike wise provided with similar rings or handles (1 for the samepurpose. The under side of the member 9 is strengthened by the ribs eand the frame a is likewise provided with strengthening-ribs a", adaptedto support the outer web a.

Having thus described the nature and objects of my invention, what Iclaim as new, and desire to secure by Letters Patent, is

The combination in a manhole-cover, of a frame or wall surmounting themanhole, two

of legssecured to said inner member and fitted on the inner web tosupport "the inner member above the inner web and a drain-pipe leadingfrom "the compartment between the webs to a sewer or other receptaclefor moisture, substantially as and for the purposes described. V

In testimony whereof I have hereunto set my signature in the presence oftwo subscribing witnesses.

. THOMAS P. GREGER.

WVitnesses:

J. WALTER DOUGLASS, THOMAS M. SMITH.

